IMO- Mathematics Olympiad Class 10: Questions 512 - 516 of 908

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Question number: 512

» Everyday Mathematics

MCQ▾

Question

Five years ago, a father was four times as old as his son. 8 years later, father’s age will be exceeding his son’s age by 12 years. The ratio of the present ages of father and son is ________

Choices

Choice (4) Response

a.

4:1

b.

7:2

c.

1:4

d.

6:5

Question number: 513

» Everyday Mathematics

MCQ▾

Question

5 bells commence tolling together and toll at intervals of 3, 6, 9, 12 and 15 seconds respectively. In 12 minutes, how many times do they toll together?

Choices

Choice (4) Response

a.

5

b.

6

c.

7

d.

4

Question number: 514

» Everyday Mathematics

MCQ▾

Question

The present ages of A, B and C are in proportions 9:8:3 . Eight years ago, the sum of their ages was 76. What are their present ages (in years)?

Choices

Choice (4) Response

a.

45,40,15

b.

16,32,56

c.

16,40,59

d.

16,28,36

Question number: 515

» Everyday Mathematics

MCQ▾

Question

Kamla got married 6 years ago. Today her age is 114 times her age at the time of marriage. Her son’s age is (110) times her age. Her son’s age is ________

Choices

Choice (4) Response

a.

5 years

b.

3 years

c.

4 years

d.

2 years

Question number: 516

» Everyday Mathematics

MCQ▾

Question

2 men and 7 boys can do a piece of work in 14 day, 3 men and 8 boys can do the same in 11 days. 8 men and 6 boys can do 3 times the amount of this work in ________

Choices

Choice (4) Response

a.

18 days

b.

36 days

c.

24 days

d.

21 days

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